placeHeading method
Stamp the first unplaced heading named title with a top-left destY.
Implementation
void placeHeading(String title, double destY) {
for (final PwHeading heading in headings) {
if (heading.title != title ||
heading.pageNumber != pageNumber ||
heading.placed) {
continue;
}
heading.destY = destY;
heading.placed = true;
anchors[title] = heading;
return;
}
}